Messier 106

106 final

Object:   M106 (NGC 4258) Date:               2019 February 24
Type:              Spiral galaxy
Constellation:           Canes Venatici Time & altitude:          22.45 UT   59º
Catalogue data: Seeing (5 high):                               3/5
            R.A:                12h 19m Transparency (5 high):                   4/5
            Dec:                47º 18 Telescope:     0.5m f4.1  Dob.
            Magnitude     8.3 Eyepiece       8mm Ethos                x260
            Size (mins)    18×7 Filters:            None


Despite the quoted magnitude, this is a difficult object to pick out any detail in. As with M109, there is no real sign of spiral structure. The long axis of the galaxy is aligned NNW-SSE. The halo is faint and asymmetric, as if the S end of it is missing. The long axis of the bright core lies NW-SE. The core seems comet-shaped with a non-stellar nucleus at the NW end. Beyond the NE side of the core it appears slightly darker but I worry this could be a contrast effect. The observed size is no more than 7 arcmins so it is clear I have failed to detect the galaxy’s outer halo.